We can perform finalize opertaion Immediately after 
completing the work and same with dispose also while in 
case of garbage collector it will dispose the object, until 
it feels they are not in use.

It is advisable not to use the finalize and Dispose
methods,because garbage collector takes Care of the objects
that Should be Disposed.We should use Finalise and Dispose
methods when working with resources in the network or
working with the unmanaged code.

Finalize method is actually a the destructor for the 
mananged objects, but if you want to destruct an unmanaged 
object dispose method allows the programmer to make 
explicit calls such as destroywindow to the destruct the 
unmanaged object.